Mercurial > libervia-backend
annotate frontends/primitivus/custom_widgets.py @ 121:03d8bcc67182
misc documentation
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Thu, 08 Jul 2010 14:19:30 +0800 |
| parents | 1ca5f254ce41 |
| children | 961e0898271f |
| rev | line source |
|---|---|
| 113 | 1 #!/usr/bin/python |
| 2 # -*- coding: utf-8 -*- | |
| 3 | |
| 4 """ | |
| 5 Primitivus: a SAT frontend | |
| 6 Copyright (C) 2009, 2010 Jérôme Poisson (goffi@goffi.org) | |
| 7 | |
| 8 This program is free software: you can redistribute it and/or modify | |
| 9 it under the terms of the GNU General Public License as published by | |
| 10 the Free Software Foundation, either version 3 of the License, or | |
| 11 (at your option) any later version. | |
| 12 | |
| 13 This program is distributed in the hope that it will be useful, | |
| 14 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 16 GNU General Public License for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 19 along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 20 """ | |
| 21 | |
| 22 import urwid | |
| 120 | 23 from urwid.escape import utf8decode |
| 113 | 24 |
| 25 class Password(urwid.Edit): | |
| 121 | 26 """Edit box which doesn't show what is entered (show '*' or other char instead)""" |
| 113 | 27 |
| 28 def __init__(self, *args, **kwargs): | |
| 121 | 29 """Same args than Edit.__init__ with an additional keyword arg 'hidden_char' |
| 30 @param hidden_char: char to show instead of what is actually entered: default '*' | |
| 31 """ | |
| 113 | 32 self.hidden_char=kwargs['hidden_char'] if kwargs.has_key('hidden_char') else '*' |
| 33 self.__real_text='' | |
| 34 super(Password, self).__init__(*args, **kwargs) | |
| 35 | |
| 36 def set_edit_text(self, text): | |
| 37 self.__real_text = text | |
| 38 hidden_txt = len(text)*'*' | |
| 39 super(Password, self).set_edit_text(hidden_txt) | |
| 40 | |
| 41 def get_edit_text(self): | |
| 42 return self.__real_text | |
| 43 | |
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44 class AdvancedEdit(urwid.Edit): |
| 121 | 45 """Edit box with some custom improvments |
| 46 new chars: | |
| 47 - C-a: like 'home' | |
| 48 - C-e: like 'end' | |
| 49 - C-k: remove everything on the right of the cursor | |
| 50 - C-w: remove the word on the back | |
| 51 new behaviour: emit a 'click' signal when enter is pressed""" | |
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52 signals = urwid.Edit.signals + ['click'] |
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53 |
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54 def keypress(self, size, key): |
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55 #TODO: insert mode is not managed yet |
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56 if key == 'ctrl a': |
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57 key = 'home' |
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58 elif key == 'ctrl e': |
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59 key = 'end' |
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60 elif key == 'ctrl k': |
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61 self._delete_highlighted() |
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62 self.set_edit_text(self.edit_text[:self.edit_pos]) |
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63 elif key == 'ctrl w': |
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64 before = self.edit_text[:self.edit_pos] |
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65 pos = before.rstrip().rfind(" ")+1 |
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66 self.set_edit_text(before[:pos] + self.edit_text[self.edit_pos:]) |
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67 self.set_edit_pos(pos) |
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68 elif key == 'enter': |
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69 self._emit('click') |
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70 return super(AdvancedEdit, self).keypress(size, key) |
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71 |
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72 |
| 120 | 73 class SurroundedText(urwid.FlowWidget): |
| 121 | 74 """Text centered on a repeated character (like a Divider, but with a text in the center)""" |
| 120 | 75 |
| 76 def __init__(self,text,car=utf8decode('─')): | |
| 77 self.text=text | |
| 78 self.car=car | |
| 79 | |
| 80 def rows(self,size,focus=False): | |
| 81 return self.display_widget(size, focus).rows(size, focus) | |
| 82 | |
| 83 def render(self, size, focus=False): | |
| 84 return self.display_widget(size, focus).render(size, focus) | |
| 85 | |
| 86 def display_widget(self, size, focus): | |
| 87 (maxcol,) = size | |
| 88 middle = (maxcol-len(self.text))/2 | |
| 89 render_text = middle * self.car + self.text + (maxcol - len(self.text) - middle) * self.car | |
| 90 return urwid.Text(render_text) | |
| 91 | |
| 92 | |
| 93 | |
| 113 | 94 class SelectableText(urwid.FlowWidget): |
| 120 | 95 """Text which can be selected with space""" |
| 113 | 96 signals = ['change'] |
| 97 | |
| 98 def __init__(self, text, align='left'): | |
| 99 self.text=unicode(text) | |
| 100 self.align = align | |
| 101 self.__selected=False | |
| 102 | |
| 103 def getValue(self): | |
| 104 return self.text | |
| 105 | |
| 106 def setState(self, selected, invisible=False): | |
| 107 """Change state | |
| 108 @param selected: boolean state value | |
| 109 @param invisible: don't emit change signal if True""" | |
| 110 assert(type(selected)==bool) | |
| 111 self.__selected=selected | |
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112 self._invalidate() |
| 113 | 113 if not invisible: |
| 114 self._emit("change", self.__selected) | |
| 115 | |
| 116 def getState(self): | |
| 117 return self.__selected | |
| 118 | |
| 119 def selectable(self): | |
| 120 return True | |
| 121 | |
| 122 def keypress(self, size, key): | |
| 123 if key==' ' or key=='enter': | |
| 124 self.setState(not self.__selected) | |
| 125 else: | |
| 126 return key | |
| 127 | |
| 128 def rows(self,size,focus=False): | |
| 129 return self.display_widget(size, focus).rows(size, focus) | |
| 130 | |
| 131 def render(self, size, focus=False): | |
| 132 return self.display_widget(size, focus).render(size, focus) | |
| 133 | |
| 134 def display_widget(self, size, focus): | |
| 135 attr = 'selected' if self.__selected else 'default' | |
| 136 if focus: | |
| 137 attr+="_focus" | |
| 138 return urwid.Text((attr,self.text), align=self.align) | |
| 139 | |
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140 class GenericList(urwid.WidgetWrap): |
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141 signals = ['click','change'] |
| 113 | 142 |
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143 def __init__(self, options, style=[], align='left', on_click=None, on_change=None, user_data=None): |
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144 """ |
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145 Widget managing list of string and their selection |
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146 @param options: list of strings used for options |
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147 @param style: list of string: |
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148 - 'single' if only one must be selected |
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149 - 'no_first_select' nothing selected when list is first displayed |
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150 - 'can_select_none' if we can select nothing |
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151 @param align: alignement of text inside the list |
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152 @param on_click: method called when click signal is emited |
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153 @param user_data: data sent to the callback for click signal |
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154 """ |
| 113 | 155 self.single = 'single' in style |
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156 self.no_first_select = 'no_first_select' in style |
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157 self.can_select_none = 'can_select_none' in style |
| 113 | 158 self.align = align |
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159 self.first_display = True |
| 113 | 160 |
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161 if on_click: |
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162 urwid.connect_signal(self, 'click', on_click, user_data) |
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163 |
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164 if on_change: |
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165 urwid.connect_signal(self, 'change', on_change, user_data) |
| 113 | 166 |
| 114 | 167 self.content = urwid.SimpleListWalker([]) |
| 113 | 168 self.list_box = urwid.ListBox(self.content) |
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169 urwid.WidgetWrap.__init__(self, self.list_box) |
| 114 | 170 self.changeValues(options) |
| 113 | 171 |
| 172 def __onStateChange(self, widget, selected): | |
| 173 if self.single: | |
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174 if not selected and not self.can_select_none: |
| 113 | 175 #if in single mode, it's forbidden to unselect a value |
| 176 widget.setState(True, invisible=True) | |
| 177 return | |
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178 if selected: |
| 113 | 179 self.unselectAll(invisible=True) |
| 180 widget.setState(True, invisible=True) | |
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181 self._emit("click") |
| 113 | 182 |
| 183 | |
| 184 def unselectAll(self, invisible=False): | |
| 185 for widget in self.content: | |
| 186 if widget.getState(): | |
| 187 widget.setState(False, invisible) | |
| 188 widget._invalidate() | |
| 189 | |
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190 def deleteValue(self, value): |
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191 """Delete the first value equal to the param given""" |
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192 for widget in self.content: |
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193 if widget.getValue() == value: |
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194 self.content.remove(widget) |
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195 self._emit('change') |
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196 return |
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197 raise ValueError("%s ==> %s" % (str(value),str(self.content))) |
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198 |
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199 def getSelectedValue(self): |
| 114 | 200 """Convenience method to get the value selected as a string in single mode, or None""" |
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201 values = self.getSelectedValues() |
| 114 | 202 return values[0] if values else None |
| 203 | |
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204 def getAllValues(self): |
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205 """Return values of all items""" |
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206 return [widget.getValue() for widget in self.content] |
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207 |
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208 def getSelectedValues(self): |
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209 """Return values of selected items""" |
| 113 | 210 result = [] |
| 211 for widget in self.content: | |
| 212 if widget.getState(): | |
| 213 result.append(widget.getValue()) | |
| 214 return result | |
| 215 | |
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216 def getDisplayWidget(self): |
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217 return self.list_box |
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218 |
| 113 | 219 def changeValues(self, new_values): |
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220 """Change all value in one shot""" |
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221 if not self.first_display: |
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222 old_selected = self.getSelectedValues() |
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223 widgets = [] |
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224 for option in new_values: |
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225 widget = SelectableText(option, self.align) |
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226 if not self.first_display and option in old_selected: |
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227 widget.setState(True) |
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228 widgets.append(widget) |
| 114 | 229 urwid.connect_signal(widget, 'change', self.__onStateChange) |
| 113 | 230 self.content[:] = widgets |
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231 if self.first_display and self.single and new_values and not self.no_first_select: |
| 114 | 232 self.content[0].setState(True) |
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233 display_widget = self.getDisplayWidget() |
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234 self._set_w(display_widget) |
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235 self._emit('change') |
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236 self.first_display = False |
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237 |
| 113 | 238 def selectValue(self, value): |
| 239 self.unselectAll() | |
| 240 idx = 0 | |
| 241 for widget in self.content: | |
|
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242 if widget.getSelectedValue() == value: |
| 113 | 243 widget.setState(True) |
| 244 self.list_box.set_focus(idx) | |
| 245 return | |
| 246 idx+=1 | |
| 247 | |
|
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248 class List(urwid.FlowWidget): |
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249 """FlowWidget list, same arguments as GenericList, with an additional one 'max_height'""" |
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250 signals = ['click','change'] |
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251 |
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252 def __init__(self, options, style=[], max_height=5, align='left', on_click=None, on_change=None, user_data=None): |
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253 self.genericList = GenericList(options, style, align, on_click, on_change, user_data) |
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254 self.max_height = max_height |
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255 |
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256 def selectable(self): |
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257 return True |
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258 |
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259 def keypress(self, size, key): |
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260 return self.displayWidget(size,True).keypress(size, key) |
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261 |
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262 def unselectAll(self, invisible=False): |
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263 return self.genericList.unselectAll(invisible) |
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264 |
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265 def deleteValue(self, value): |
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266 return self.genericList.deleteValue(value) |
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267 |
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268 def getSelectedValue(self): |
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269 return self.genericList.getSelectedValue() |
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270 |
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271 def getAllValues(self): |
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272 return self.genericList.getAllValues() |
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273 |
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274 def getSelectedValues(self): |
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275 return self.genericList.getSelectedValues() |
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276 |
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277 def changeValues(self, new_values): |
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278 return self.genericList.changeValues(new_values) |
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279 |
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280 def selectValue(self, value): |
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281 return self.genericList.selectValue(value) |
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282 |
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283 def render(self, size, focus=False): |
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284 return self.displayWidget(size, focus).render(size, focus) |
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285 |
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286 def rows(self, size, focus=False): |
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287 return self.displayWidget(size, focus).rows(size, focus) |
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288 |
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289 def displayWidget(self, size, focus): |
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290 list_size = sum([wid.rows(size, focus) for wid in self.genericList.content]) |
| 120 | 291 height = min(list_size,self.max_height) or 1 |
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292 return urwid.BoxAdapter(self.genericList, height) |
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293 |
| 120 | 294 ## DIALOGS ## |
| 295 | |
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296 class GenericDialog(urwid.WidgetWrap): |
| 113 | 297 |
| 298 def __init__(self, widgets_lst, title, style=[], **kwargs): | |
| 299 frame_header = urwid.AttrMap(urwid.Text(title,'center'),'title') | |
| 300 | |
| 301 buttons = None | |
| 302 | |
| 303 if "OK/CANCEL" in style: | |
| 304 buttons = [urwid.Button(_("Cancel"), kwargs['cancel_cb']), | |
| 305 urwid.Button(_("Ok"), kwargs['ok_cb'], kwargs['ok_value'])] | |
| 306 elif "YES/NO" in style: | |
| 307 buttons = [urwid.Button(_("Yes"), kwargs['yes_cb']), | |
| 308 urwid.Button(_("No"), kwargs['no_cb'], kwargs['yes_value'])] | |
| 114 | 309 if "OK" in style: |
| 310 buttons = [urwid.Button(_("Ok"), kwargs['ok_cb'], kwargs['ok_value'])] | |
| 113 | 311 if buttons: |
| 312 buttons_flow = urwid.GridFlow(buttons, max([len(button.get_label()) for button in buttons])+4, 1, 1, 'center') | |
| 313 widgets_lst.append(buttons_flow) | |
| 314 body_content = urwid.SimpleListWalker(widgets_lst) | |
| 315 frame_body = urwid.ListBox(body_content) | |
| 316 frame = urwid.Frame(frame_body, frame_header) | |
| 317 decorated_frame = urwid.LineBox(frame) | |
| 318 urwid.WidgetWrap.__init__(self, decorated_frame) | |
| 319 | |
| 320 | |
| 321 | |
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322 class InputDialog(GenericDialog): |
| 121 | 323 """Dialog with an edit box""" |
| 113 | 324 |
| 120 | 325 def __init__(self, title, instrucions, style=['OK/CANCEL'], default_txt = '', **kwargs): |
| 113 | 326 instr_wid = urwid.Text(instrucions+':') |
| 120 | 327 edit_box = urwid.Edit(edit_text=default_txt) |
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328 GenericDialog.__init__(self, [instr_wid,edit_box], title, style, ok_value=edit_box, **kwargs) |
| 113 | 329 |
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330 class ConfirmDialog(GenericDialog): |
| 121 | 331 """Dialog with buttons for confirm or cancel an action""" |
| 113 | 332 |
| 333 def __init__(self, title, style=['YES/NO'], **kwargs): | |
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334 GenericDialog.__init__(self, [], title, style, yes_value=None, **kwargs) |
| 114 | 335 |
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336 class Alert(GenericDialog): |
| 121 | 337 """Dialog with just a message and a OK button""" |
| 114 | 338 |
| 339 def __init__(self, title, message, style=['OK'], **kwargs): | |
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340 GenericDialog.__init__(self, [urwid.Text(message, 'center')], title, style, ok_value=None, **kwargs) |
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341 |
| 120 | 342 ## CONTAINERS ## |
| 343 | |
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344 class FocusFrame(urwid.Frame): |
| 121 | 345 """Frame which manage 'tab' key""" |
|
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346 |
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347 def keypress(self, size, key): |
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348 if key == 'tab': |
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349 focus_list = ('header','body','footer') |
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350 focus_idx = focus_list.index(self.focus_part) |
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351 for i in range(2): |
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352 focus_idx = (focus_idx + 1) % len(focus_list) |
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353 focus_name = focus_list[focus_idx] |
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354 widget = getattr(self,'_'+focus_name) |
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355 if widget!=None and widget.selectable(): |
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356 self.set_focus(focus_name) |
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357 |
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358 return urwid.Frame.keypress(self, size, key) |
| 120 | 359 |
| 360 ## DECORATORS ## | |
| 361 class LabelLine(urwid.LineBox): | |
| 121 | 362 """Like LineBox, but with a Label centered in the top line""" |
| 120 | 363 |
| 364 def __init__(self, original_widget, label_widget): | |
| 365 urwid.LineBox.__init__(self, original_widget) | |
| 366 top_columns = self._w.widget_list[0] | |
| 367 top_columns.widget_list[1] = label_widget | |
| 368 |